Fullstack Lead UI Developer (MEAN / MERN stack)

Role Overview

We are looking for a Senior Full Stack Developer to build and scale our fintech platform. You will own the entire lifecycle of our financial products, from designing high-performance relational schemas in PostgreSQL to building interactive dashboards in React.

Key Responsibilities

• Full Stack Development: Build and maintain end-to-end features using the PERN stack

(PostgreSQL, Express.js, React, Node.js).

• Database Optimization: Design complex relational models and optimize SQL queries to

handle high-volume financial data and audit trails.

• Security & Compliance: Implement rigorous security measures (e.g., JWT, OAuth, data

encryption) and ensure the platform adheres to fintech standards like PCI-DSS.

• API Architecture: Develop robust RESTful APIs to integrate with third-party banking APIs,

payment processors (Stripe/Plaid), and KYC providers.

Technical Requirements

• Front-end: Advanced proficiency in React.js (Hooks, Context API, Redux or TanStack Query)

and modern CSS (Tailwind/Styled Components).

• Back-end: Expert-level Node.js and Express.js experience, with a focus on asynchronous

programming and secure API design.

• Database: Deep knowledge of PostgreSQL (complex joins, indexing, triggers, and

migrations).

Additional skills

• Understanding of Event-Driven Architecture (using AWS SQS/SNS or Kafka).

• Familiarity with SOC2 or ISO 27001 compliance frameworks.

• Cloud (AWS): Proven experience with:

• RDS/Aurora for managed databases.
• IAM for secure access management.
• AWS Lambda & API Gateway for serverless architecture.
• CloudWatch for monitoring and alerting.

• Tools: Git, Docker, and experience with CI/CD workflows.

About US

RJ Fintech Solutions Pvt. Ltd. is a high-growth fintech startup on a mission to automate business financial operations. In a world where financial systems are often slow and opaque, we are building the "missing link"—a secure, transparent, and lightning-fast platform that puts banking and compliance first for various corporates.

We are not just another financial app; we are an engineering-first company. We believe that elegant code and robust architecture are the foundations of trust. By leveraging the PERN stack and AWS cloud-native infrastructure, we are replacing legacy complexity with modern, scalable solutions.

Why Work With Us?

1. Build the Foundation, Not Just Features

You won't be a small cog in a massive machine. As an early member of our engineering team, you will help define our technical architecture, choose our libraries, and set the coding standards for everyone who follows. Your fingerprints will be on the core DNA of our product.

2. Solve Problems That Matter

Fintech is one of the few industries where code has a direct, measurable impact on people's lives.

Whether we are [e.g., simplifying cross-border payments, democratizing investment, or building the next generation of credit], you will be solving high-stakes challenges around security, trust, and financial inclusion.

Position Overview: The Lead Software Architect - Python & Data Engineering is a senior technical leadership role responsible for designing and owning end-to-end architecture for data-intensive, AI/ML, and analytics platforms, while mentoring developers and ensuring technical excellence across the organization. 

Key Responsibilities: 

• Design end-to-end software architecture for data-intensive applications, AI/ML pipelines, and analytics platforms
• Evaluate trade-offs between competing technical approaches 
• Define data models, API approach, and integration patterns across systems 
• Create technical specifications and architecture documentation 
• Lead by example through production-grade Python code and mentor developers on engineering fundamentals 
• Conduct design and code reviews focused on architectural soundness 
• Establish engineering standards, coding practices, and design patterns for the team 
• Translate business requirements into technical architecture 
• Collaborate with data scientists, analysts, and other teams to design integrated solutions 
• Whiteboard and defend system design and architectural choices 
• Take responsibility for system performance, reliability, and maintainability 
• Identify and resolve architectural bottlenecks proactively 

Required Skills:  

• 8+ years of experience in software architecture and development  
• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field 
• Strong foundations in data structures, algorithms, and computational complexity 
• Experience in system design for scale, including caching strategies, load balancing, and asynchronous processing  
• 6+ years of Python development experience 
• Deep knowledge of Django, Flask, or FastAPI 
• Expert understanding of Python internals including GIL and memory management 
• Experience with RESTful API design and event-driven architectures (Kafka, RabbitMQ) 
• Proficiency in data processing frameworks such as Pandas, Apache Spark, and Airflow 
• Strong SQL optimization and database design experience (PostgreSQL, MySQL, MongoDB)  Experience with AWS, GCP, or Azure cloud platforms 
• Knowledge of containerization (Docker) and orchestration (Kubernetes) 
• Hands-on experience designing CI/CD pipelines Preferred (Bonus) 

Skills: 

• Experience deploying ML models to production (MLOps, model serving, monitoring) Understanding of ML system design including feature stores and model versioning 
• Familiarity with ML frameworks such as scikit-learn, TensorFlow, and PyTorch  
• Open-source contributions or technical blogging demonstrating architectural depth 
• Experience with modern front-end frameworks for full-stack perspective

Job Description:

We are seeking a skilled Full Stack Developer to join our growing team. As a Full Stack Developer at AlphaBI, you will play a critical role in designing, developing, and maintaining both front-end and back-end components of our web and mobile applications. If you are a proactive problem-solver with a passion for technology and a desire to work in a fast-paced environment, we want to hear from you.

Key Responsibilities:

• Develop and maintain web applications using React, JavaScript, SQL, and MongoDB.

• Collaborate with cross-functional teams to define, design, and ship new features.

• Optimize applications for maximum speed and scalability.

• Ensure the technical feasibility of UI/UX designs.

• Develop server-side logic, databases, and APIs to support front-end functionality.

• Write clean, maintainable, and well-documented code.

• Troubleshoot and debug issues to enhance application performance.

• Stay updated with emerging technologies and apply them to improve the development process.

Required Skills:

• Proficiency in React and JavaScript for front-end development.

• Strong experience with SQL and MongoDB for database management.

• Understanding of RESTful APIs and web services.

• Knowledge of version control systems like Git.

• Ability to work independently and as part of a team.

• Excellent problem-solving skills and attention to detail.

Optional Skills (a plus):

• Experience with TypeScript.

• Familiarity with Next.js for server-side rendering.

• Knowledge of Flutter for cross-platform mobile app development.

Qualifications:

• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

• 2+ years of experience as a Full Stack Developer or similar role.

• Strong portfolio demonstrating relevant work experience.

Benefits:

• Competitive salary based on experience.

• Opportunities for professional growth and development.

• Collaborative and inclusive work environment.

Roles and Responsibilities:

·         Design and implement scalable web applications and platforms using technologies such as Typescript, NestJS, Angular, NodeJS, ExpressJS, TypeORM, and Postgres

·         Good understanding of web and REST API design patterns

·         Experience with AWS technologies such as EKS, ECS, ECR, Fargate, EC2, Lambda, ALB will be an added advantage

·         Hands-on experience with unit test frameworks like Jest

·         Good working knowledge of JIRA, Confluence, Git

·         Basic knowledge of Kubernetes and Terraform for infrastructure as code

·         Basic knowledge of Docker compose and Docker

·         Strong understanding of microservices architecture and ability to implement components independently

·         Proven track record of problem-solving skills

·         Excellent communication skills

Company Profile:- https://www.hashstudioz.com/">https://www.hashstudioz.com/

Job description

• Working knowledge of React JS
• Working knowledge of Redux, ES6, and Webpack.
• Good knowledge of OOP development and design patterns.
• Experience in debugging the application.
• Experience in handling browser compatibility issues.
• Good to have a working knowledge of NodeJS, Express, MongoDB/SQL.
• Must have expertise in unit testing (Jasmine/Mocha/Karma/Jest).
• Working knowledge of HTML5 & CSS3.
• Working knowledge of any CSS preprocessor- SASS, LESS, Stylus
• Experience in integrating front-end code with server-side technology like MVC (good to have).
• Responsible for communication with the clients.
• Strong interpersonal and communication skills.

About Company:

About Job:
As a MEAN stack developer, you should be comfortable around both front-end and back-end coding languages, development frameworks, and third-party libraries. You should also be a team player with a knack for visual design and utility.

We want a team member who strives to develop a first-class codebase using Angular best practices.

• Write effective, scalable code
• Develop front-end and back-end components to improve responsiveness and overall performance
• Integrate user-facing elements into applications
• Test and debug programs
• Improve functionality of existing systems
• Implement security and data protection solutions
• Assess and prioritize feature requests
• Coordinate with internal teams to understand user requirements and provide technical solutions

• BSc/BE/BTech/ME/MTech/MCA/MCS in Computer Science, Engineering or a related field
• Must have work experience on MongoDB, Expressjs, AngularJs, NodeJS.
• Must have work experience as a React or Angular (Front-end) and Node JS (Back-end) developer. Good to have a working knowledge of NestJS,
• Strong expertise with HTML, CSS, and writing cross-browser compatible code.
• Good understanding of AJAX and JavaScript DOM manipulation Techniques
• Experience with RESTful services
• Hands-on and implements complex Angular modules
• Able to implement automated testing platforms and unit tests
• Understanding of fundamental design principles behind a scalable application
• Proficient understanding of code versioning tools (Git)
• Critical thinker and problem-solving skills
• Team player
• Good time-management skills
• Great interpersonal and communication skills

Job Summary

• Lead technology developer responsible for managing self and a team of 1-2 developers
• Typical experience of 2-4 years
• Handing internal business users and external vendors
• Reporting directly to C level

Responsibilities and Duties

• Development of in house product platform
• Documenting platform roadmap
• Implementing and managing the product rollout as per roadmap
• Triaging issues and troubleshooting
• Managing different environments - development, test, production

Key Skills
MongoDB, Node.js, AngularJS, Angular, Amazon Web Services, JavaScript, REST, JSON, S3
Required Experience and Qualifications

• 2-4 years of experience
• Education qualification - BE
• Product development background
• Strong communication skills with confidence in managing cross-geographical stakeholders

Benefits

• Access to the C suite with first hand contribution to strategy development
• Flexible working hours and remote working when required
• Operations based in Koramangala
• Trainings and certifications can be reimbursed